If the mention of Testors paint bottles brings you back to your childhood, you'd better get down to Trost Modelcraft & Hobbies before Tuesday evening, as it's closing up shop after 78 years. Although the company's wholesale distribution business will continue, it's the retail store that customers will be mourning, a store that was once a main gathering place for kids back when Lionel trains and slotcar racing were big national pastimes.